.err {
  width: 100%;
  height: 100%;
  background-color: #fff;
  padding: 48px 15px 48px;
  text-align: center;

  img {
    width: 30%;
  }

  @media (max-width: 768px) {
    img {
      width: 80%;
    }
  }


  h1 {
    font-size: 42px;
    margin: 25px 0;
    font-weight: 500;
    line-height: 1.2;
  }

  .caption-text {
    font-size: 15px;
    line-height: 24px;
    color: #7d8b9b;
  }

  a {
    border-radius: 100px;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: 1px;
    padding: 17px 39px;
    text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.14);
    text-transform: uppercase;
    box-shadow: 0 4px 9px 0 rgba(0, 0, 0, 0.2);
    display: inline-block;
    margin-top: 15px;
    background-image: linear-gradient(135deg, #5a7ce2 0%, #8283e8 50%, #5c5de8 51%, #565bd8 71%, #575cdb 100%);
    animation: AnimationName 3s ease infinite;
    color: #fff;
    background-size: 400% 400%;
    transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
  }

  @keyframes AnimationName {
    0% {
      background-position: 0% 31%
    }
    50% {
      background-position: 100% 70%
    }
    100% {
      background-position: 0% 31%
    }
  }
}